Young lovebirds Selena Gomez and Justin Bieber were hand in hand for a stroll in Santa Monica yesterday afternoon. Justin was back in California after a stint in NYC appearing in Dana Carvey's episode of Saturday Night Live, which also featured a special Wayne's World flashback skit with Mike Meyers. He had a busy week doing Big Apple TV cameos, also saying hi to David Letterman and Jon Stewart. Despite his location on the West Coast, Justin was still able to partake in some of the Super Bowl fun. He prerecorded an ad for Best Buy, which featured the pop star decked out like a much older, bearded version of himself. Justin and Selena enjoyed a break from their equally packed schedules, but now it's back to work. He tweeted before bed last night, "Time to get some rest . . . Grammy rehearsals tomorrow."